Seat adjustment apparatus for vehicle

Abstract

A seat adjustment apparatus for a vehicle includes a plurality of connection frames provided along two opposite sides of a seat frame and two opposite sides of a back frame and configured to move forward or rearward depending on a folding direction of the back frame, guide parts provided at middle points of the plurality of connection frames and configured to be moved upward or downward by forward or rearward movements of the connection frames, and a seat cushion pipe provided inside the two connection frames and configured such that front ends of the seat cushion pipe are connected to the guide parts, and a position of a rear end of the seat cushion pipe is adjusted upward or downward by upward or downward movements of the guide parts.

What is claimed is: 
     
         1 . A seat adjustment apparatus for a vehicle, the seat adjustment apparatus comprising:
 a plurality of connection frames provided along each of two opposite sides of a seat frame and two opposite sides of a back frame and configured to move forward or rearward depending on a folding direction of the back frame;   guide parts operably connected to the plurality of connection frames and configured to be moved upward or downward by forward or rearward movements of the connection frames; and   a seat cushion pipe operably connected to the plurality of connection frames and configured such that the seat cushion pipe is connected to the guide parts, and a position of a rear end of the seat cushion pipe is adjusted upward or downward by upward or downward movements of the guide parts.   
     
     
         2 . The seat adjustment apparatus of  claim 1 , wherein the guide parts are provided at middle points of one of the plurality of connection frames. 
     
     
         3 . The seat adjustment apparatus of  claim 1 , wherein the seat cushion pipe is provided inside the plurality of connection frames. 
     
     
         4 . The seat adjustment apparatus of  claim 3 , wherein front ends of the seat cushion pipe are connected to the guide parts. 
     
     
         5 . The seat adjustment apparatus of  claim 1 , wherein the plurality of connection frames comprises:
 front frames provided at a front side and disposed along the two opposite sides of the seat frame; and   rear frames provided at a rear side, disposed along the two opposite sides of the seat frame and the two opposite sides of the back frame, and connected to the front frames.   
     
     
         6 . The seat adjustment apparatus of  claim 5 , wherein the front frames and the rear frames move forward in response to the back frame being folded forward, and
 wherein the front frames and the rear frames move rearward in response to the back frame being folded rearward.   
     
     
         7 . The seat adjustment apparatus of  claim 6 , wherein a rear end of one of the guide parts moves upward in response to the front frames and the rear frames moving forward, and
 wherein the rear end of the one of the guide parts moves downward in response to the front frames and the rear frames moving rearward.   
     
     
         8 . The seat adjustment apparatus of  claim 5 , wherein the guide parts are provided at points where the front frames and the rear frames are connected to each other. 
     
     
         9 . The seat adjustment apparatus of  claim 8 , wherein each of the guide parts comprises:
 a guide bracket having a slot groove; and   an intermediate link having one side connected to the front frames, and the other side connected to the slot groove, and   wherein the intermediate link moves forward or rearward in the slot groove depending on the folding direction of the back frame.   
     
     
         10 . The seat adjustment apparatus of  claim 9 , wherein the front end of the seat cushion pipe is coupled to the guide bracket by welding. 
     
     
         11 . The seat adjustment apparatus of  claim 5 , further comprising:
 drive links provided forward of the guide parts and connected to the front frames and configured to be rotatable by forward or rearward movements of the front and rear frames,   wherein in response to the back frame being folded forward or rearward, the drive links rotate and allows the seat frame to move downward or upward.   
     
     
         12 . The seat adjustment apparatus of  claim 1 , wherein the intermediate link moves rearward in the slot groove in response to the back frame being folded forward, and
 wherein the intermediate link moves forward in the slot groove in response to the back frame being folded rearward.   
     
     
         13 . The seat adjustment apparatus of  claim 1 , wherein two opposite ends of the seat cushion pipe are connected to the guide parts, and a central portion of the seat cushion pipe is formed in a shape recessed toward a rear side of the seat frame. 
     
     
         14 . A vehicle comprising the seat adjustment apparatus of  claim 1 .